When to plant Celeriac in Carlton County, MN
Carlton County gardeners should plant Celeriac between May 5 and May 26 in spring. With Carlton County's Zone 4a climate (last frost May 12), Celeriac needs 100–120 days to mature — plant by June 4 for a full harvest. A second sowing from July 10 to July 24 extends the harvest into fall.
When to Plant Celeriac in Carlton County, MN
Your June gardening checklist
Here's what deserves your attention in Carlton County, Minnesota this month. Everything below is tailored to Zone 4a and timed around your local frost dates.
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Fire up the seed-starting tray: celeriac
Label every cell. You will absolutely forget which is which otherwise.
Coming up in July — start thinking about
- Fall sowing: celeriac
Celeriac is a celery relative grown for its knobby, flavorful root rather than its stalks. It has a rich celery flavor and is excellent roasted, mashed, or in soups.
Carlton County, Minnesota is in USDA Zone 4a. The average last spring frost is May 12 and the first fall frost is October 2, giving you a growing season of approximately 143 days.
At an elevation of 516 feet, Carlton County receives approximately 32.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 82°F, so choose short-season varieties of Celeriac to ensure they mature before fall.
Carlton County Soil Profile
Soil Type
Silt Loam
Soil pH
6.2-7.1
Drainage
Well Drained
Celeriac Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Carlton County
How your county's soil matches Celeriac's growing requirements.
Soil pH
Your soil pH (6.2–7.1) overlaps with Celeriac's range (6.0–7.0), though not a perfect match.
Soil Texture
The silt loam soil in Carlton County is excellent for Celeriac — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.5%) — Celeriac will thrive.
How to Plant Celeriac
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Celeriac Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Celeriac
Celeriac needs approximately 0.9 inches of water per week (3.9" per month). Here's how your county's rainfall compares month by month.
| Month | Celeriac Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.5" | 0" | ❄️ Dormant |
| Feb | — | 1.5" | 0" | ❄️ Dormant |
| Mar | — | 2.5" | 0" | ❄️ Dormant |
| Apr | — | 3.1" | 0" | ❄️ Dormant |
| May | 3.9" | 3.4" | 0.5" | 💧 Light watering |
| Jun | 3.9" | 4.1" | 0" | ✅ Rainfall sufficient |
| Jul | 3.9" | 3.5" | 0.4" | 💧 Light watering |
| Aug | 3.9" | 3.4" | 0.5" | 💧 Light watering |
| Sep | 3.9" | 2.7" | 1.2" | 💧 Light watering |
| Oct | 3.9" | 2.8" | 1.1" | 💧 Light watering |
| Nov | — | 2.5" | 0" | ❄️ Dormant |
| Dec | — | 1.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Carlton County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Celeriac Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Celeriac Planting Timeline — Carlton County, MN
Celeriac Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 31 | Mar 31 – Apr 14 |
| Transplant Outdoors | May 12 | May 12 – May 26 |
| Direct Sow | May 5 | May 5 – May 26 |
| Harvest | August 25 | Aug 25 – Sep 29 |
| Fall Sowing | July 10 | Jul 10 – Jul 24 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.9"/week · Natural rainfall sufficient
📅 Days to Maturity
100–120 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 4a
📆 Growing Season
143 days in Carlton County
Growing Tips for Celeriac in Carlton County
Direct sow Celeriac outdoors after May 12 in Carlton County when soil has warmed and frost danger has passed.
Common pests for Celeriac in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 10-12 weeks before last frost. Remove side roots as they develop to encourage a single large bulb. Harvest after a light frost for best flavor.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Celeriac in Other Locations
Frequently Asked Questions
When should I plant Celeriac in Carlton County, MN?
Carlton County is in Zone 4a with an average last frost of May 12. Plan your Celeriac planting based on this frost date — see the calendar above for exact timing.
What planting zone is Carlton County, MN?
Carlton County, Minnesota is in USDA Hardiness Zone 4a. The average last spring frost is May 12 and first fall frost is October 2.
When should I plant Celeriac in Carlton County, MN?
In Carlton County, MN, plant Celeriac after the last frost (around May 12) and before the first frost (around October 2). Best results when soil holds above 50°F.
What growing zone is Carlton County, MN for Celeriac?
Carlton County sits in USDA Zone 4a. Celeriac grows reliably in zones 3a through 9b, so it's a good fit here.
Can Celeriac grow in Carlton County's climate?
Yes — Celeriac grows well in Carlton County's temperate climate. Carlton County averages a 143-day frost-free season, with last frost around May 12 and first frost around October 2.
Your Carlton County Garden Planner — Free
A 22-page printable planner built for Carlton County (Zone 4a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.